-5% is the change from 580 to 551
Calculation steps:
[( 551 - 580 ) ÷ 580] x 100 = -5%
Formula
Percentage change = [(551 - 580) / 580] x 100
Subtract the new number by the original number
551 - 580 = -29
-29 ÷ 580 = -0.05
-0.05 x 100 = -5%
Example